| Rock Island to Lombard (Illinois) | 135.39 mi (217.89 km) |
| Rock Island to Lomita (California) | 1,599.34 mi (2,573.89 km) |
| Rock Island to Lompoc (California) | 1,683.08 mi (2,708.66 km) |
| Rock Island to London (Ohio) | 389.77 mi (627.27 km) |
| Rock Island to Lone Tree (Colorado) | 761.62 mi (1,225.71 km) |
| Rock Island to Long Beach (California) | 1,591.54 mi (2,561.33 km) |
| Rock Island to Long Beach (Mississippi) | 771.62 mi (1,241.80 km) |
| Rock Island to Long Beach (New York) | 882.42 mi (1,420.12 km) |
| Rock Island to Long Branch (New Jersey) | 869.12 mi (1,398.72 km) |
| Rock Island to Longmont (Colorado) | 763.50 mi (1,228.73 km) |
| Rock Island to Longview (Texas) | 659.81 mi (1,061.86 km) |
| Rock Island to Longview (Washington) | 1,634.66 mi (2,630.72 km) |
| Rock Island to Longwood (Florida) | 1,023.66 mi (1,647.42 km) |
| Rock Island to Lorain (Ohio) | 434.75 mi (699.66 km) |
| Rock Island to Lorton (Virginia) | 731.23 mi (1,176.79 km) |
